--- /dev/null
+/*
+ * XHCI HCD glue for Cavium Octeon III SOCs.
+ *
+ * Copyright (C) 2010-2017 Cavium Networks
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/of_platform.h>
+
+#include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-gpio-defs.h>
+
+/* USB Control Register */
+union cvm_usbdrd_uctl_ctl {
+ uint64_t u64;
+ struct cvm_usbdrd_uctl_ctl_s {
+ /* 1 = BIST and set all USB RAMs to 0x0, 0 = BIST */
+ __BITFIELD_FIELD(uint64_t clear_bist:1,
+ /* 1 = Start BIST and cleared by hardware */
+ __BITFIELD_FIELD(uint64_t start_bist:1,
+ /* Reference clock select for SuperSpeed and HighSpeed PLLs:
+ * 0x0 = Both PLLs use DLMC_REF_CLK0 for reference clock
+ * 0x1 = Both PLLs use DLMC_REF_CLK1 for reference clock
+ * 0x2 = SuperSpeed PLL uses DLMC_REF_CLK0 for reference clock &
+ * HighSpeed PLL uses PLL_REF_CLK for reference clck
+ * 0x3 = SuperSpeed PLL uses DLMC_REF_CLK1 for reference clock &
+ * HighSpeed PLL uses PLL_REF_CLK for reference clck
+ */
+ __BITFIELD_FIELD(uint64_t ref_clk_sel:2,
+ /* 1 = Spread-spectrum clock enable, 0 = SS clock disable */
+ __BITFIELD_FIELD(uint64_t ssc_en:1,
+ /* Spread-spectrum clock modulation range:
+ * 0x0 = -4980 ppm downspread
+ * 0x1 = -4492 ppm downspread
+ * 0x2 = -4003 ppm downspread
+ * 0x3 - 0x7 = Reserved
+ */
+ __BITFIELD_FIELD(uint64_t ssc_range:3,
+ /* Enable non-standard oscillator frequencies:
+ * [55:53] = modules -1
+ * [52:47] = 2's complement push amount, 0 = Feature disabled
+ */
+ __BITFIELD_FIELD(uint64_t ssc_ref_clk_sel:9,
+ /* Reference clock multiplier for non-standard frequencies:
+ * 0x19 = 100MHz on DLMC_REF_CLK* if REF_CLK_SEL = 0x0 or 0x1
+ * 0x28 = 125MHz on DLMC_REF_CLK* if REF_CLK_SEL = 0x0 or 0x1
+ * 0x32 = 50MHz on DLMC_REF_CLK* if REF_CLK_SEL = 0x0 or 0x1
+ * Other Values = Reserved
+ */
+ __BITFIELD_FIELD(uint64_t mpll_multiplier:7,
+ /* Enable reference clock to prescaler for SuperSpeed functionality.
+ * Should always be set to "1"
+ */
+ __BITFIELD_FIELD(uint64_t ref_ssp_en:1,
+ /* Divide the reference clock by 2 before entering the
+ * REF_CLK_FSEL divider:
+ * If REF_CLK_SEL = 0x0 or 0x1, then only 0x0 is legal
+ * If REF_CLK_SEL = 0x2 or 0x3, then:
+ * 0x1 = DLMC_REF_CLK* is 125MHz
+ * 0x0 = DLMC_REF_CLK* is another supported frequency
+ */
+ __BITFIELD_FIELD(uint64_t ref_clk_div2:1,
+ /* Select reference clock freqnuency for both PLL blocks:
+ * 0x27 = REF_CLK_SEL is 0x0 or 0x1
+ * 0x07 = REF_CLK_SEL is 0x2 or 0x3
+ */
+ __BITFIELD_FIELD(uint64_t ref_clk_fsel:6,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_31_31:1,
+ /* Controller clock enable. */
+ __BITFIELD_FIELD(uint64_t h_clk_en:1,
+ /* Select bypass input to controller clock divider:
+ * 0x0 = Use divided coprocessor clock from H_CLKDIV
+ * 0x1 = Use clock from GPIO pins
+ */
+ __BITFIELD_FIELD(uint64_t h_clk_byp_sel:1,
+ /* Reset controller clock divider. */
+ __BITFIELD_FIELD(uint64_t h_clkdiv_rst:1,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_27_27:1,
+ /* Clock divider select:
+ * 0x0 = divide by 1
+ * 0x1 = divide by 2
+ * 0x2 = divide by 4
+ * 0x3 = divide by 6
+ * 0x4 = divide by 8
+ * 0x5 = divide by 16
+ * 0x6 = divide by 24
+ * 0x7 = divide by 32
+ */
+ __BITFIELD_FIELD(uint64_t h_clkdiv_sel:3,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_22_23:2,
+ /* USB3 port permanently attached: 0x0 = No, 0x1 = Yes */
+ __BITFIELD_FIELD(uint64_t usb3_port_perm_attach:1,
+ /* USB2 port permanently attached: 0x0 = No, 0x1 = Yes */
+ __BITFIELD_FIELD(uint64_t usb2_port_perm_attach:1,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_19_19:1,
+ /* Disable SuperSpeed PHY: 0x0 = No, 0x1 = Yes */
+ __BITFIELD_FIELD(uint64_t usb3_port_disable:1,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_17_17:1,
+ /* Disable HighSpeed PHY: 0x0 = No, 0x1 = Yes */
+ __BITFIELD_FIELD(uint64_t usb2_port_disable:1,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_15_15:1,
+ /* Enable PHY SuperSpeed block power: 0x0 = No, 0x1 = Yes */
+ __BITFIELD_FIELD(uint64_t ss_power_en:1,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_13_13:1,
+ /* Enable PHY HighSpeed block power: 0x0 = No, 0x1 = Yes */
+ __BITFIELD_FIELD(uint64_t hs_power_en:1,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_5_11:7,
+ /* Enable USB UCTL interface clock: 0xx = No, 0x1 = Yes */
+ __BITFIELD_FIELD(uint64_t csclk_en:1,
+ /* Controller mode: 0x0 = Host, 0x1 = Device */
+ __BITFIELD_FIELD(uint64_t drd_mode:1,
+ /* PHY reset */
+ __BITFIELD_FIELD(uint64_t uphy_rst:1,
+ /* Software reset UAHC */
+ __BITFIELD_FIELD(uint64_t uahc_rst:1,
+ /* Software resets UCTL */
+ __BITFIELD_FIELD(uint64_t uctl_rst:1,
+ ;)))))))))))))))))))))))))))))))))
+ } s;
+};
+
+/* UAHC Configuration Register */
+union cvm_usbdrd_uctl_host_cfg {
+ uint64_t u64;
+ struct cvm_usbdrd_uctl_host_cfg_s {
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_60_63:4,
+ /* Indicates minimum value of all received BELT values */
+ __BITFIELD_FIELD(uint64_t host_current_belt:12,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_38_47:10,
+ /* HS jitter adjustment */
+ __BITFIELD_FIELD(uint64_t fla:6,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_29_31:3,
+ /* Bus-master enable: 0x0 = Disabled (stall DMAs), 0x1 = enabled */
+ __BITFIELD_FIELD(uint64_t bme:1,
+ /* Overcurrent protection enable: 0x0 = unavailable, 0x1 = available */
+ __BITFIELD_FIELD(uint64_t oci_en:1,
+ /* Overcurrent sene selection:
+ * 0x0 = Overcurrent indication from off-chip is active-low
+ * 0x1 = Overcurrent indication from off-chip is active-high
+ */
+ __BITFIELD_FIELD(uint64_t oci_active_high_en:1,
+ /* Port power control enable: 0x0 = unavailable, 0x1 = available */
+ __BITFIELD_FIELD(uint64_t ppc_en:1,
+ /* Port power control sense selection:
+ * 0x0 = Port power to off-chip is active-low
+ * 0x1 = Port power to off-chip is active-high
+ */
+ __BITFIELD_FIELD(uint64_t ppc_active_high_en:1,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_0_23:24,
+ ;)))))))))))
+ } s;
+};
+
+/* UCTL Shim Features Register */
+union cvm_usbdrd_uctl_shim_cfg {
+ uint64_t u64;
+ struct cvm_usbdrd_uctl_shim_cfg_s {
+ /* Out-of-bound UAHC register access: 0 = read, 1 = write */
+ __BITFIELD_FIELD(uint64_t xs_ncb_oob_wrn:1,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_60_62:3,
+ /* SRCID error log for out-of-bound UAHC register access:
+ * [59:58] = chipID
+ * [57] = Request source: 0 = core, 1 = NCB-device
+ * [56:51] = Core/NCB-device number, [56] always 0 for NCB devices
+ * [50:48] = SubID
+ */
+ __BITFIELD_FIELD(uint64_t xs_ncb_oob_osrc:12,
+ /* Error log for bad UAHC DMA access: 0 = Read log, 1 = Write log */
+ __BITFIELD_FIELD(uint64_t xm_bad_dma_wrn:1,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_44_46:3,
+ /* Encoded error type for bad UAHC DMA */
+ __BITFIELD_FIELD(uint64_t xm_bad_dma_type:4,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_13_39:27,
+ /* Select the IOI read command used by DMA accesses */
+ __BITFIELD_FIELD(uint64_t dma_read_cmd:1,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_10_11:2,
+ /* Select endian format for DMA accesses to the L2c:
+ * 0x0 = Little endian
+ *` 0x1 = Big endian
+ * 0x2 = Reserved
+ * 0x3 = Reserved
+ */
+ __BITFIELD_FIELD(uint64_t dma_endian_mode:2,
+ /* Reserved */
+ __BITFIELD_FIELD(uint64_t reserved_2_7:6,
+ /* Select endian format for IOI CSR access to UAHC:
+ * 0x0 = Little endian
+ *` 0x1 = Big endian
+ * 0x2 = Reserved
+ * 0x3 = Reserved
+ */
+ __BITFIELD_FIELD(uint64_t csr_endian_mode:2,
+ ;))))))))))))
+ } s;
+};
+
+#define OCTEON_H_CLKDIV_SEL 8
+#define OCTEON_MIN_H_CLK_RATE 150000000
+#define OCTEON_MAX_H_CLK_RATE 300000000
+
+static DEFINE_MUTEX(dwc3_octeon_clocks_mutex);
+static uint8_t clk_div[OCTEON_H_CLKDIV_SEL] = {1, 2, 4, 6, 8, 16, 24, 32};
+
+
+static int dwc3_octeon_config_power(struct device *dev, u64 base)
+{
+#define UCTL_HOST_CFG 0xe0
+ union cvm_usbdrd_uctl_host_cfg uctl_host_cfg;
+ union cvmx_gpio_bit_cfgx gpio_bit;
+ uint32_t gpio_pwr[3];
+ int gpio, len, power_active_low;
+ struct device_node *node = dev->of_node;
+ int index = (base >> 24) & 1;
+
+ if (of_find_property(node, "power", &len) != NULL) {
+ if (len == 12) {
+ of_property_read_u32_array(node, "power", gpio_pwr, 3);
+ power_active_low = gpio_pwr[2] & 0x01;
+ gpio = gpio_pwr[1];
+ } else if (len == 8) {
+ of_property_read_u32_array(node, "power", gpio_pwr, 2);
+ power_active_low = 0;
+ gpio = gpio_pwr[1];
+ } else {
+ dev_err(dev, "dwc3 controller clock init failure.\n");
+ return -EINVAL;
+ }
+ if ((OCTEON_IS_MODEL(OCTEON_CN73XX) ||
+ OCTEON_IS_MODEL(OCTEON_CNF75XX))
+ && gpio <= 31) {
+ gpio_bit.u64 = cvmx_read_csr(CVMX_GPIO_BIT_CFGX(gpio));
+ gpio_bit.s.tx_oe = 1;
+ gpio_bit.cn73xx.output_sel = (index == 0 ? 0x14 : 0x15);
+ cvmx_write_csr(CVMX_GPIO_BIT_CFGX(gpio), gpio_bit.u64);
+ } else if (gpio <= 15) {
+ gpio_bit.u64 = cvmx_read_csr(CVMX_GPIO_BIT_CFGX(gpio));
+ gpio_bit.s.tx_oe = 1;
+ gpio_bit.cn70xx.output_sel = (index == 0 ? 0x14 : 0x19);
+ cvmx_write_csr(CVMX_GPIO_BIT_CFGX(gpio), gpio_bit.u64);
+ } else {
+ gpio_bit.u64 = cvmx_read_csr(CVMX_GPIO_XBIT_CFGX(gpio));
+ gpio_bit.s.tx_oe = 1;
+ gpio_bit.cn70xx.output_sel = (index == 0 ? 0x14 : 0x19);
+ cvmx_write_csr(CVMX_GPIO_XBIT_CFGX(gpio), gpio_bit.u64);
+ }
+
+ /* Enable XHCI power control and set if active high or low. */
+ uctl_host_cfg.u64 = cvmx_read_csr(base + UCTL_HOST_CFG);
+ uctl_host_cfg.s.ppc_en = 1;
+ uctl_host_cfg.s.ppc_active_high_en = !power_active_low;
+ cvmx_write_csr(base + UCTL_HOST_CFG, uctl_host_cfg.u64);
+ } else {
+ /* Disable XHCI power control and set if active high. */
+ uctl_host_cfg.u64 = cvmx_read_csr(base + UCTL_HOST_CFG);
+ uctl_host_cfg.s.ppc_en = 0;
+ uctl_host_cfg.s.ppc_active_high_en = 0;
+ cvmx_write_csr(base + UCTL_HOST_CFG, uctl_host_cfg.u64);
+ dev_warn(dev, "dwc3 controller clock init failure.\n");
+ }
+ return 0;
+}
+
+static int dwc3_octeon_clocks_start(struct device *dev, u64 base)
+{
+ union cvm_usbdrd_uctl_ctl uctl_ctl;
+ int ref_clk_sel = 2;
+ u64 div;
+ u32 clock_rate;
+ int mpll_mul;
+ int i;
+ u64 h_clk_rate;
+ u64 uctl_ctl_reg = base;
+
+ if (dev->of_node) {
+ const char *ss_clock_type;
+ const char *hs_clock_type;
+
+ i = of_property_read_u32(dev->of_node,
+ "refclk-frequency", &clock_rate);
+ if (i) {
+ pr_err("No UCTL \"refclk-frequency\"\n");
+ return -EINVAL;
+ }
+ i = of_property_read_string(dev->of_node,
+ "refclk-type-ss", &ss_clock_type);
+ if (i) {
+ pr_err("No UCTL \"refclk-type-ss\"\n");
+ return -EINVAL;
+ }
+ i = of_property_read_string(dev->of_node,
+ "refclk-type-hs", &hs_clock_type);
+ if (i) {
+ pr_err("No UCTL \"refclk-type-hs\"\n");
+ return -EINVAL;
+ }
+ if (strcmp("dlmc_ref_clk0", ss_clock_type) == 0) {
+ if (strcmp(hs_clock_type, "dlmc_ref_clk0") == 0)
+ ref_clk_sel = 0;
+ else if (strcmp(hs_clock_type, "pll_ref_clk") == 0)
+ ref_clk_sel = 2;
+ else
+ pr_err("Invalid HS clock type %s, using pll_ref_clk instead\n",
+ hs_clock_type);
+ } else if (strcmp(ss_clock_type, "dlmc_ref_clk1") == 0) {
+ if (strcmp(hs_clock_type, "dlmc_ref_clk1") == 0)
+ ref_clk_sel = 1;
+ else if (strcmp(hs_clock_type, "pll_ref_clk") == 0)
+ ref_clk_sel = 3;
+ else {
+ pr_err("Invalid HS clock type %s, using pll_ref_clk instead\n",
+ hs_clock_type);
+ ref_clk_sel = 3;
+ }
+ } else
+ pr_err("Invalid SS clock type %s, using dlmc_ref_clk0 instead\n",
+ ss_clock_type);
+
+ if ((ref_clk_sel == 0 || ref_clk_sel == 1) &&
+ (clock_rate != 100000000))
+ pr_err("Invalid UCTL clock rate of %u, using 100000000 instead\n",
+ clock_rate);
+
+ } else {
+ pr_err("No USB UCTL device node\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Step 1: Wait for all voltages to be stable...that surely
+ * happened before starting the kernel. SKIP
+ */
+
+ /* Step 2: Select GPIO for overcurrent indication, if desired. SKIP */
+
+ /* Step 3: Assert all resets. */
+ uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
+ uctl_ctl.s.uphy_rst = 1;
+ uctl_ctl.s.uahc_rst = 1;
+ uctl_ctl.s.uctl_rst = 1;
+ cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);
+
+ /* Step 4a: Reset the clock dividers. */
+ uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
+ uctl_ctl.s.h_clkdiv_rst = 1;
+ cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);
+
+ /* Step 4b: Select controller clock frequency. */
+ for (div = 0; div < OCTEON_H_CLKDIV_SEL; div++) {
+ h_clk_rate = octeon_get_io_clock_rate() / clk_div[div];
+ if (h_clk_rate <= OCTEON_MAX_H_CLK_RATE &&
+ h_clk_rate >= OCTEON_MIN_H_CLK_RATE)
+ break;
+ }
+ uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
+ uctl_ctl.s.h_clkdiv_sel = div;
+ uctl_ctl.s.h_clk_en = 1;
+ cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);
+ uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
+ if ((div != uctl_ctl.s.h_clkdiv_sel) || (!uctl_ctl.s.h_clk_en)) {
+ dev_err(dev, "dwc3 controller clock init failure.\n");
+ return -EINVAL;
+ }
+
+ /* Step 4c: Deassert the controller clock divider reset. */
+ uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
+ uctl_ctl.s.h_clkdiv_rst = 0;
+ cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);
+
+ /* Step 5a: Reference clock configuration. */
+ uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
+ uctl_ctl.s.ref_clk_sel = ref_clk_sel;
+ uctl_ctl.s.ref_clk_fsel = 0x07;
+ uctl_ctl.s.ref_clk_div2 = 0;
+ switch (clock_rate) {
+ default:
+ dev_err(dev, "Invalid ref_clk %u, using 100000000 instead\n",
+ clock_rate);
+ case 100000000:
+ mpll_mul = 0x19;
+ if (ref_clk_sel < 2)
+ uctl_ctl.s.ref_clk_fsel = 0x27;
+ break;
+ case 50000000:
+ mpll_mul = 0x32;
+ break;
+ case 125000000:
+ mpll_mul = 0x28;
+ break;
+ }
+ uctl_ctl.s.mpll_multiplier = mpll_mul;
+
+ /* Step 5b: Configure and enable spread-spectrum for SuperSpeed. */
+ uctl_ctl.s.ssc_en = 1;
+
+ /* Step 5c: Enable SuperSpeed. */
+ uctl_ctl.s.ref_ssp_en = 1;
+
+ /* Step 5d: Cofngiure PHYs. SKIP */
+
+ /* Step 6a & 6b: Power up PHYs. */
+ uctl_ctl.s.hs_power_en = 1;
+ uctl_ctl.s.ss_power_en = 1;
+ cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);
+
+ /* Step 7: Wait 10 controller-clock cycles to take effect. */
+ udelay(10);
+
+ /* Step 8a: Deassert UCTL reset signal. */
+ uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
+ uctl_ctl.s.uctl_rst = 0;
+ cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);
+
+ /* Step 8b: Wait 10 controller-clock cycles. */
+ udelay(10);
+
+ /* Steo 8c: Setup power-power control. */
+ if (dwc3_octeon_config_power(dev, base)) {
+ dev_err(dev, "Error configuring power.\n");
+ return -EINVAL;
+ }
+
+ /* Step 8d: Deassert UAHC reset signal. */
+ uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
+ uctl_ctl.s.uahc_rst = 0;
+ cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);
+
+ /* Step 8e: Wait 10 controller-clock cycles. */
+ udelay(10);
+
+ /* Step 9: Enable conditional coprocessor clock of UCTL. */
+ uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
+ uctl_ctl.s.csclk_en = 1;
+ cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);
+
+ /*Step 10: Set for host mode only. */
+ uctl_ctl.u64 = cvmx_read_csr(uctl_ctl_reg);
+ uctl_ctl.s.drd_mode = 0;
+ cvmx_write_csr(uctl_ctl_reg, uctl_ctl.u64);
+
+ return 0;
+}
+
+static void __init dwc3_octeon_set_endian_mode(u64 base)
+{
+#define UCTL_SHIM_CFG 0xe8
+ union cvm_usbdrd_uctl_shim_cfg shim_cfg;
+
+ shim_cfg.u64 = cvmx_read_csr(base + UCTL_SHIM_CFG);
+#ifdef __BIG_ENDIAN
+ shim_cfg.s.dma_endian_mode = 1;
+ shim_cfg.s.csr_endian_mode = 1;
+#else
+ shim_cfg.s.dma_endian_mode = 0;
+ shim_cfg.s.csr_endian_mode = 0;
+#endif
+ cvmx_write_csr(base + UCTL_SHIM_CFG, shim_cfg.u64);
+}
+
+#define CVMX_USBDRDX_UCTL_CTL(index) \
+ (CVMX_ADD_IO_SEG(0x0001180068000000ull) + \
+ ((index & 1) * 0x1000000ull))
+static void __init dwc3_octeon_phy_reset(u64 base)
+{
+ union cvm_usbdrd_uctl_ctl uctl_ctl;
+ int index = (base >> 24) & 1;
+
+ uctl_ctl.u64 = cvmx_read_csr(CVMX_USBDRDX_UCTL_CTL(index));
+ uctl_ctl.s.uphy_rst = 0;
+ cvmx_write_csr(CVMX_USBDRDX_UCTL_CTL(index), uctl_ctl.u64);
+}
+
+static int __init dwc3_octeon_device_init(void)
+{
+ const char compat_node_name[] = "cavium,octeon-7130-usb-uctl";
+ struct platform_device *pdev;
+ struct device_node *node;
+ struct resource *res;
+ void __iomem *base;
+
+ /*
+ * There should only be three universal controllers, "uctl"
+ * in the device tree. Two USB and a SATA, which we ignore.
+ */
+ node = NULL;
+ do {
+ node = of_find_node_by_name(node, "uctl");
+ if (!node)
+ return -ENODEV;
+
+ if (of_device_is_compatible(node, compat_node_name)) {
+ pdev = of_find_device_by_node(node);
+ if (!pdev)
+ return -ENODEV;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (res == NULL) {
+ dev_err(&pdev->dev, "No memory resources\n");
+ return -ENXIO;
+ }
+
+ /*
+ * The code below maps in the registers necessary for
+ * setting up the clocks and reseting PHYs. We must
+ * release the resources so the dwc3 subsystem doesn't
+ * know the difference.
+ */
+ base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(base))
+ return PTR_ERR(base);
+
+ mutex_lock(&dwc3_octeon_clocks_mutex);
+ dwc3_octeon_clocks_start(&pdev->dev, (u64)base);
+ dwc3_octeon_set_endian_mode((u64)base);
+ dwc3_octeon_phy_reset((u64)base);
+ dev_info(&pdev->dev, "clocks initialized.\n");
+ mutex_unlock(&dwc3_octeon_clocks_mutex);
+ devm_iounmap(&pdev->dev, base);
+ devm_release_mem_region(&pdev->dev, res->start,
+ resource_size(res));
+ }
+ } while (node != NULL);
+
+ return 0;
+}
+device_initcall(dwc3_octeon_device_init);
+
+MODULE_AUTHOR("David Daney <david.daney@cavium.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("USB driver for OCTEON III SoC");
projects / platform / kernel / linux-exynos.git / commitdiff